Nori's structural-rank conjecture for closures of algebraic-group subgroups
Nori's structural-rank conjecture for closures of algebraic-group subgroups
Let be a commutative algebraic group over that is either a torus or an abelian variety, with Lie algebra over and exponential map
Let be finitely generated, torsion free, and of rank . For each finite prime for which its closure in is compact and contains as a finite-index subgroup, define accordingly. Nori's structural-rank conjecture. The integers are independent of and equal the structural rank of the linear map induced by . This is proposed as a common-value refinement of Nori's question, with no resolution evidence supplied.
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Sources & referencesView supporting material
Primary source
Dipendra Prasad, “Some questions in Diophantine approximation: real and p-adics”, arXiv:2505.15744 (2025).
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